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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ea0a6b179f766ae227e36a72b99ec227ec35cc284420ab2142fb4d82940457e' 
  AND token = 'WnyZaxD0+VDrhO3BGup5igdPPiY1jpYa3YePzR2kfZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}